ML4902CT Micro Linear, ML4902CT Datasheet

ML4902CT

Manufacturer Part Number

ML4902CT

Description

TSSOP

Manufacturer

Micro Linear

Datasheet

1.ML4902CT.pdf (12 pages)

Specifications of ML4902CT

Date_code

04+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

ML4902CT

Manufacturer:

Quantity:

20 000

Current page: 1 of 12
Download datasheet (192Kb)

GENERAL DESCRIPTION

The ML4902 high current synchronous buck controller

provides high efficiency DC/DC conversion to generate

II from Intel

The ML4902 controller, when combined with 2 N-channel

MOSFETs, generates output voltages between 1.8V and

3.5V from a 5V supply. The output voltage is selected via

an internal 2 chord 4-bit DAC. In the upper range, the

output can be set between 2.1V and 3.5V in 100mV steps.

In the lower range, the output can be set between 1.8V

and 2.05V in 50mV steps. Output currents in excess of

20A can be attained at efficiencies greater than 90%.

The ML4902 can be enabled/disabled via the SHDN pin.

While disabled, the output of the regulator is completely

isolated from the circuit’s input supply. The ML4902

employs fixed-frequency PWM control combined with a

sophisticated control loop enhancement circuit to provide

excellent load transient response.

BLOCK DIAGRAM

CCP

for processors such as the Pentium

V DD

V CC

PROTECT

SHDN

RANGE

10.5V

30µA

4.4V

4 BIT DAC

2 CHORD

High Current Synchronous Buck Controller

–

V DAC + 3%

V DAC - 3%

3.5V

V FB

UVLO

–

V DAC

Pro and Pentium

–

V DAC + 10%

V DAC - 10%

V DAC + 3%

V DAC - 3%

V FB

FEATURES

–

Designed to meet Pentium Pro and Pentium II VRM

power supply requirements

DC regulation to +1% maximum

Proprietary circuitry provides transient response of ±5%

maximum over a 0A to 20A load range

Programmable output voltage (1.8V to 3.5V) is set by

an onboard 2 chord 4-bit DAC

Synchronous N-channel buck topology for maximum

power conversion efficiency

Fixed frequency operation for easier system integration

Integrated anti-shootthrough logic, short circuit

protection, shutdown, and UV lockout

200kHz

–

CONTROL

LOGIC

REFERENCE

–

3.5V

V DAC

–97mV

GND

PWR GOOD

PWR GND

N DRV H

N DRV L

I SENSE

COMP

V REF

V FB

ML4902

May 1998

Related parts for ML4902CT

Related keywords

ML4902CT datasheet
ML4902CT data sheet
ML4902CT pdf datasheet
ML4902CT component
ML4902CT part
ML4902CT distributor
ML4902CT RoHS
ML4902CT datasheet download